Yin Yang Platformer (Work in progress)

This is a 2D co-op game where each player controls either Yin or Yang. Each character can only step on the ground that matches their colour, E.g. Yin - Black, Yang - White. The players can swap their characters if they press their 'Swap' button simultaneously. Timing this swap is key to completing the level. Yin and Yang start at opposite ends of the level and have to collide to restore balance and win.